The Transportation Security Administration (TSA) was established in 2001 in the Department of Transportation. It was transferred to the newly-created Department of Homeland Security in 2003. It is responsible for maintaining the security of transportation in the U.S., including the screening of passengers and luggage.
Government Documents provides access to laws and regulations related to transportation security and the activities of the TSA. We also have numerous Congressional hearings about TSA. Look for these in GovInfo or ProQuest Congressional (UHM login required).
The TSA does not have an annual report per se. It issues annual statistics of numbers of prohibited items found in luggage and other data in the form of blog posts.